Teaching clock



FIG. 1 is a front elevational view of a teaching clock showing our newdesign;

FIG. 2 is a side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a bottom plan view;

FIG. 6 is a front elevational view with the sliding cover member in aclosed position; and

FIG. 7 is a perspective view thereof.

The ornamental design for a teaching clock, as shown and described.